X-Originating-IP: [200.42.4.138]
From: "Norberto Alfredo Bensa" <ceo AT nbensacomputers DOT com>
To: "Martin Str|mberg" <ams AT ludd DOT luth DOT se>
Cc: <djgpp-workers AT delorie DOT com>
References: <200101051844 DOT TAA15180 AT father DOT ludd DOT luth DOT se>
Subject: Re: Fw: Patch for statfs.c
Date: Fri, 5 Jan 2001 17:11:22 -0300
Organization: nBens@ Computers
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Reply-To: djgpp-workers AT delorie DOT com

Hello,

From: "Martin Str|mberg" <ams AT ludd DOT luth DOT se>
> While I'm very satisfied with your work, Norberto, yet another case
> has dawned on me: DVD-drives.
>
> WINDOZE 98 says "4 634 253 213 bytes 4,31GB" when I select
> properies of my R: drive when it contains a DVD-ROM. Interestingly, if
> I in EXPLORER select everything and right-click properties WINDOZE
> says "Size: 4,31GB (4 634 200 064), 4 634 476 544

Hmm, guessing : EXPLORER only counts space wasted by files. It doesn't count
space wasted by directories and FATs etc...

(BTW, 4,634,253,213, ?????.... I hope it's a typo... )

> bytes". Meanwhile WINDOZE "dir /v" says
> " Volume in drive R is FOURWEDDING
>  Volume Serial Number is 9688-FAFF
>  Directory of R:\
> File Name         Size        Allocated      Modified      Accessed Attrib
>
>
> AUDIO_TS       <DIR>                      00-08-09  15.56  00-08-09  R  DA
> AUDIO_TS
> VIDEO_TS       <DIR>                      00-08-09  16.46  00-08-09  R  DA
> VIDEO_TS
>          0 file(s)              0 bytes
>          2 dir(s)            0.00 MB free
>                          4 419.57 MB total disk space, 100% in use".

4,419.57 is 4,634,253,213 (from properties of R) / 1024^2... 'dir' seems to
use 217303.

>
> So we have several right values...
>
> Alas df compiled with our latest (the one you have made) statfs.c says
> "FOURWEDDINGS         2295300 2295300        0    100%   r:/".
>
> The one from fil316b.zip says
> "FOURWEDDINGS         2295300 2295300        0    100%   r:/" so there
> has been no regression.
>
> However if I try the INT21 AX=7303 on R: I get:
> "r:/ -> 0, (0), bsize = 2048, blocks = 2262819, bfree = 0." which
> evaluates to 4 634 253 312 which is in accordance with the first
> WINDOZE value above. (Program source last in this message.)
>
> It would be neat if we could make this work also.
>
> In statfs.c there is this text:
>   /* For a CD-ROM drive, Int 21h/AX=3600h gives incorrect info.
>      Use CD-ROM-specific calls if they are available.
>
>      Int 2Fh/AX=1510h gives us a way of doing IOCTL with the
>      CD-ROM device driver without knowing the name of the
>      device (which is defined by the CONFIG.SYS line that
>      installs the driver and can therefore be arbitrary).  */
>
> So I ask the list on which platforms does Int 21h/AX=3600h give
> incorrect info?
>
> My testing seems to say that in (WINDOZE 98's) plain DOZE mode does
> not support INT21 AX=7303/7302. So there we must fall back to the
> earlier methods.
>

IIRC, on _my_ Win98, 217302 works on plain DOS mode... I'll do some tests.

>
> Right,
>
> MartinS
>
>

Best regards,
Norberto